Machine for making phonogram-blanks



- Patented Nov. 27,1888;

g ilg at (Nd Model.) I

' T. A. EDISON.

MACHINE FOR'MAKING PHONOGRAM BLANKS.

I No. 393,463;

. blanks and then to reduce tures for this purpose is objectionable' nogram-blank. Iti's NITED STATES PATENT QFFICE.

THOMAS A. EDISON OF LLEWELLYN PARK, NEW JERSEY, ASSIGNOR TO THE EDISON PHONOGRAPH COMPANY, OF NEW JERSEY..

Mnohmeros MAKING uosoennm- -stmxs.

SPECIFICATION forming part of Letters Patent No. 393,463, dated November 27, 1888.

Applihatlou ma May 7, 1888.

To all whom it may concern:

Be it known that-I, THOMAS A. EDIsoN, a citizen of the United States, residing at Llewellyn Park, in the county of Essex andSta-te of 'New Jersey, haveinvented a certain new and which I prefer to employ is one made entirely of wax or a wax composition in the form of a cylinder. having a cylindrical outer surface and a tapering bore. These blanks I first mold from the wax or wax composition; but owing to the excessive contraction of the wax in cooling the blanks are somewhat distorted and do not have the accurate shape and size required; Hence it becomes necessary to mold the blanks slightly larger than the size for the finished them by cutting to the proper size and -shape, both externally and internally. I have found that the use of the ordinary cutting-tools at ordinary tempera- In-my application of even date herewith, (Case No. 768, $erial No. 273,038,) I have described a inethodof finishing these blanks consistingin cutting them externally and internally with hented'knives or cutters.

The object of my present invention is to provide a proper tool for reaming out the wax phonogram-blank, so as to make its bore, aeeurately of the size and shapedesired.

.ln theaccompnuying drawings, forminga part hereof, Figure 1 is a side elevation of the improved rcamer. .hig. 2 is a cross'scetion 011 the line 1-2:. 'Fig. 3 is a longitudinal section through the rcamer and its'shai't on the line 3 3 and Fig. i is an elevation of the exhaust-outlet for the heating medium.

A is a suitable base or table,from which rise pedestals a h, in whichis jonrnaled the shaft Ii, carrying the'tnpering rcamer-(l.. Upon the shaft between the pedestals is the pulley D, by

means of which power is applied to thcreamer for revolving it rapidly. The reamcr Ois made tapering, it having the exact size and shape it is desired to give the bore of the wax phoprovided with cutting.- knivcs c. The shaft B and manner 0 are made Serial 30.218.039. (No model.)

hollo'w, the passage or channel 11 extending entirely through the reamer, but being closed at the smallend of the reamer. Into the channel dis introduced centrally a stationary pipe, E, which is rigidly held by a bracket, e, rising from the base A, out of contact-with the sides of the channel d,'so that the reamer C and shaft B can be revolved while the pipe E'is held at rest. The shaft B terminates between 6c the pedestal b and brackets, and-is pro- 'videda with a stufling-box, f, which closes the openin at around the pipe E at this point. Secure to the onterface of the pedestal b is a box or chamber,-F, whiehfits closely around 6 5 the shaft B, such shaft being proyided with a number of perforations, y, where it is covered by this box. The pipe E and the box F are connected with leading-pipes h 2, provided with stop-cocks j k. Aheating medium, which is preferably steam, but may be hot water or hot air, is supplied to the pipe h and passes into the pipe E at its other end-within the .reamer C, and-then passes out of such pipe E through its open endand' through the peri'orations Z in such pipe E into the channel d around the pipe E, and thence returns through such channel lZ-to the perforations g, and out of such perforations into the box F, and thence out by the pipe 12, the flow of the heating meo diumbeing controlled bythe stop-cocks j k.'

Thus the reamer can be maintained at the precise temperature desired.

To determine the extent to which the wax phonogram-blank will be pushed upon the reamer, I providea gage-arm, G,- which'passes' 7 over the reamer and is screwed to an arm, m, held by a set-screw, 11., to the side of the pedestal a. By means of the set-screw n the gage arm Gcan be set to any point dcsi red. The arm or may have ascale marked upon it to indicate the position to which the gage-arm is set. This enables me to ream out phonogramblanks of dillerent lengths.

The hollow cylindrical wax phouo'gramblanks are taken in the hand and are pushed onto the rcamer' and withdrawn from. it by a continuous motion, the reamer being brought up to the desired temperature and, the combined action of heating and cutting rapidly and smoothly reaming out. the hereof the blank. The wax blanks are preferably heated by a hot table; oven, or chamber approximately to the temperature of the reamer before being cut by the manner, in order to m'event cracking by unequal expansion.

What I claim as my invention is- 1. Arevolving remner havingeutting knives or edges, and provided with means for heating it, substantially as set forth.

7 2. A revolvingreamer havingcntting knives or edges, and made hollow, in combination with pi e-conneotions for introducing aheating me inm into the hollow reamer, substantially as set forth.

3. The combination, with a revolving shaft, 13, and reamer 0, made hollow, of a stationary i 5 pipe, E, and the box F, substantially as set forth. i l 4 This specification signed and witnessed this I 28th day of April, 1888.

WILLIAM PELZER, A. W. KIDDLE. 

